事件，自己创建委托例子

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication1
{
    public class BossDemo
    {
        public delegate void BossDelegete(string msg);  //定义委托
        public event BossDelegete BossEvent; //定义BossDelete委托类型的事件

        public void Onmsg(string msg)
        {
            if (BossEvent != null)  //判断是否绑定了事件处理方法
            {
              BossEvent(msg);
            }
        
        }
        static void Main(string [] args)
        {

            BossDemo b = new BossDemo();
            Worker w1 = new Worker("1");
            Worker w2= new Worker("2");
            b.BossEvent += new BossDelegete(w1.SendMessage);    使用+=事件订阅.
            b.BossEvent += new BossDelegete(w2.SendMessage);
            b.Onmsg("朋友你好今晚上加班");
            Console.WriteLine("---------------------------");
            Console.ReadKey();



            }
    }
    public class Worker
    {
        private string workerId;
        public Worker(string wi)
        {
            this.workerId = wi;
        
        }
//事件处理函数，该函数符合委托的定义
        public void SendMessage(string msg)
        {
            Console.WriteLine(msg);
            Console.WriteLine(this.workerId + "卧槽又加班");
            Console.Read();
        }




    }
}